Ancient global warming

Trying to make a connection across 300 million years is fraught with uncertainty, none of which is addressed in this article.

I sure hope Yale geochemist Berner was misrepresented, because he would know that what they attributed to him was not true.

Assuming that the geologic record is what scientists think it is, there is no way that in 4.5 billion years of earth history there were only two such events.